Draw frame stop motion apparatus



March 28, 1967 J, ROBERTSON 3,310,844

DRAW FRAME STOP MOTION APPARATUS Filed June 30, 1964 3 Sheets-Sheet 1INVENTOR.

JOHN A. ROBERTSON BY LO/Mi l a" I D A L 1541 1,

ATTORNEY March 28, 1967 J. A. ROBERTSON 3,310,844

DRAW FRAME STOP MOTION APPARATUS Filed June 30, 1964 3 Sheets-Sheet 2 INVENTOR. JO H N A R0 B E RTSON BY {Wei M "Wt/MW ATTO RN EY March 28, 1967J. A. ROBERTSON 3,310,844

DRAW FRAME STOP MOTION APPARATUS Filed June 30, 1964 5 Sheets-Sheet 5FIG. '5-

I N VE NTOR.

JOHN A. ROBERTSON BY ATTORNEY United States Patent 3,310,844 DRAW FRAMESTGP MOTION APPARATUS John A. Robertson, Greenville, S.C., assignor toDeering Milliken Research Corporation, Spartanburg, S.C., a corporationof Deiaware Filed June 30, 1964, Ser. No. 379,277 1 Claim. (Cl. 19-.25)

This invention relates generally to stop motion apparatus for textilemachinery and in particular to stop motion apparatus for draw frames toprovide complete control.

The purpose of draw frames is to combine and/or blend a multiplicity ofstrands of sliver yarns into a single sliver and at the same timepartially or wholly place the fibers in the sliver parallel to oneanother. In any particular draw frame operation you are combining acertain preselected number of strands of sliver to provide a certainquality of yarn to the roving frame. If one of the strands of sliver tobe combined should break and the draw frame is not stopped, theresultant product from the draw frame will not be of the desired qualityand will, therefore, have to be reworked or discarded as waste.Furthermore, when the draw frame is equipped with a power driven creelthe creel will tend to pile up sliver on the creel table until theoperator spots the broken sliver and pieces up the broken end. Toprevent this waste of sliver and time of the operator it is necessary,to correct this sit-nation, that the draw frame be designed so that thedraw frame will be stopped immediately if a sliver should break anywherebetween the incoming sliver cans and the draw box where the sliver iscombined and drafted.

Therefore, it is an object of the invention to provide a draw frame witha stop motion control which will stop the operation of the draw frame ifa sliver should break between the power driven creels and the draw box.

Another object of the invention is to provide a draw frame which employsa simple and inexpensive stop motion control to stop the draw frame incase the sliver breaks prior to blending and drafting in the draw box.

A still further object of the invention is to provide a stop motion fora draw frame which will prevent a pile up on the creel table if a strandof sliver should break.

Other objects and advantages of the invention will be clearly apparentas the specification proceeds to describe the invention with referenceto the accompanying drawings in which:

FIGURE 1 is a partial top schematic view of a two delivery draw frame;

FIGURE 2 is an elevation View taken on line 22 of FIGURE 1;

FIGURE 3 is a blown-up cross-sectional view taken through one set ofentry rolls;

FIGURE 4 is a view similar to FIGURE 3 except the sliver is shownbroken; and

FIGURE 5 is a schematic simplified circuit diagram of the stop motioncontrol circuit.

Looking at FIGURES l and 2 in particular the general operation of thedraw frame is shown. A multiplicity of strands of sliver S are deliveredindividually from individual sliver cans to the creel table 12,supported by suitable support 14, through the power driven creelincluding the lifter roll 16 and the presser roll 18. Normally thelifter roll 16 will be the driven roll and the presser roll 18 will be aweighted roll. From the rolls 16 and 18 each individual strand of sliverpasses around guide member 20 and is delivered into the draw box 22where the individual strands of sliver are blended or combined, draftedand coiled into a sliver can 24.

If the sliver S should break between the cans 10 and the rolls 16 and 18or should run out, the rolls 16 and 3,310,844 Patented Mar. 28, 1967 18would make contact and energize solenoid coil 26 (FIGURE 5), therebyopening switch 28 and breaking the circuit to the draw frame and lifterroll drive means 30. The operator can then piece up the end or replacethe sliver can whichever is necessary and then restart the draw frame.In normal operation the sliver S will prevent the rolls 16 and 18 frommaking contact with one another. Drive means 30 can be connected to thedraw frame and the lifter rolls 16 in any suitable manner.

Mounted to the creel table 12 between the creel table and the rolls 16and 18 is an elongated channel member 32 of copper or other suitableconductive material. Channel member 32 preferably extends between foursets of rolls 16 and 18 but it is obvious that it could extend the wholelength of the creel table or a shorter channel member could be providedfor each set of rolls 16 and 18. Pivotally mounted to the creel table 12by suitable supports 33 is a U-shaped Wire member 34 which in normaloperation hangs in the center of channel member 32 but does not engagethe channel member. Channel member 32 is connected into the draw framedrive means control circuit through insultated wire member 36 held inposition on the under side of the front 38 of the creel table 12 by abolt 40 and a nut 42 secured thereto.

Assume now that the sliver should break somewhere between the rolls 16and 18 and the draw box 22. As soon as the break occurs the sliver Sfrom the cans 10 will begin to pile up on the creel table 12. When thispile up occurs the sliver will tend to accumulate in the channel member32 (FIGURE 4) and cause the U-shaped wire member 34 to pivot in onedirection or the other and contact the channel member 32. As soon as thewire member 34 contacts the channel member 32 a circuit will becompleted to energize the solenoid coil 26 causing switch 28 to beopened and thereby breaking the circuit to the draw frame drive means 30and stopping the draw frame. As soon as the end ha been pieced up theoperator and the channel 32 cleared the U-shaped wire member 34 willassume its normal operating position and the draw frame can berestarted.

It can readily be seen that the herein disclosed stop motion apparatusprovides protection to the draw frame if the sliver should run out or ifthe sliver should break between the sliver cans and the draw box. Aspreviously pointed out the disclosed stop motion will stop the drawframe before the run out or breakage condition will allow the draw boxto blend and draft strands of less number than desired. This, of course,results in a saving of yarn that is of off-standard weight and savesconsiderable time of the operator since he no longer has to remove lightsliver from can 24. Furthermore, to aid the operator it is within thescope of the invention to wire a light 44 in series with both of thedisclosed controls so that not only will the draw frame be stopped butthe operator also will be signaled when the draw frame has stopped.

Although I have described in detail the preferred embodiment of myinvention, I contemplate that many changes may be made without departingfrom the scope or spirit of my invention, and I desire to be limitedonly by the claim.

That which i claimed is:

A draw frame comprising: a draw box, a creel table operably associatedwith said draw box, a plurality of pairs of rolls in operativerelationship with sliver supply adjacent said creel table, draw framedrive means supplying sliver from said sliver supply through said pairsof rolls, onto said creel table and into said draw box, a U- shapedchannel member mounted between said pairs of rolls and said creel tablewith the legs of the channel member extending upwardly providing anopening therebe- 3 4 tween, bracket means mounted to said creel tableand pro- References Cited by the Examiner jecting outwardly therefromtoward said pairs of rolls, a FOREIGN PATENTS Wire member freely pivotedin said bracket means and hanging free into said opening in said channelmember 11631481 4/1958 Franceand means electrically interconnecting saidwire member, 5 1,288,818 2/1962 France said channel member and said drawframe drive means 4711945 9/1937 Great m to deactivate said drive meanswhen the sliver breaks be- 978,993 1/1965 Great Bntamtween said draw boxand said pairs of rolls and said sliver acts against said wire member topivot said Wire member MERVIN STEIN Pflmary Exammer' into contact withsaid channel member. 10 DORSEY NEWTON, Examiner.

